/*
 * Copyright 2013-present the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.cloud.kubernetes.configserver;

import java.util.List;

import io.kubernetes.client.openapi.apis.CoreV1Api;

import org.springframework.core.env.Environment;
import org.springframework.core.env.MapPropertySource;
import org.springframework.util.StringUtils;

/**
 * @author Ryan Baxter
 */
public interface KubernetesPropertySourceSupplier {

	List<MapPropertySource> get(CoreV1Api coreV1Api, String name, String namespace, Environment environment);

	/*
	 * return either a List containing 'currentNamespace' (if 'namespacesString' is empty
	 * or null), or a List of comma delimited tokens (namespaces) from 'namespacesString'.
	 *
	 * 'currentNamespace' can be treated logically as the "default namespace" to use, if
	 * the other argument is not provided.
	 */
	static List<String> namespaceSplitter(String namespacesString, String currentNamespace) {
		List<String> namespaces = List.of(currentNamespace);
		String[] namespacesArray = StringUtils.commaDelimitedListToStringArray(namespacesString);
		if (namespacesArray.length > 0) {
			namespaces = List.of(namespacesArray);
		}
		return namespaces;
	}

}
